Cooling of pistons.



T., HEUTE-L,

COOLING 0E PSTONS.

APPL1cAT1oNr-1mmwov-z, 1910.

Patented am 2, MMS.

H @mi ,y

estema,

l'l'y ODOEiBlETER, 0F WINTERTHUR, SWITZERLAND, ASSIGNO T0 BUSCH-SBaosJ-nlnsnn'nuerun coureur, or sr. Louis, missouri,l a conroaa'rrou orrarsso ccoLI'Ne or rrs'rous.

vspea1e-amfnewmet. Patent cameriere.

Application filed November 2, 1810. Serial No.' 590,315.

' To al whom it may concern.'

Beit known that I, Trmonon Raum, engineer, a citizen of the SwissRepublic, residing at 24 Obere Wielandstrasse, Winterthur, Switzerland,have invented certain new and useful Improvements inor Relating to theCooling of Pistons; and I do hereby declare the following toibe a full,

clear, and exact description ofthe. invention, such as will enableothers skilled in the artto. which it appertains to make and use thesame.'

vvThis invention is an improved means forl cooling reciprocatingrpistonsor like members.

In' systems'of .p1ston-cooling, heretofore employed, diiiiculty has beenexperienced with the stuiiing-boxes, to keep them tight underthepressure of the cooling liquid and which the cooling liquid is suppliedcan be accordingl reduced without sacrifice of cooling e ect, and otherimprovements in the cooling etliciency are rendered available;

in `particular, `the necessity for stboxes is avoided.

vA construction, of cooling apparatusfem;

' bodying the present invention 1s illustrated,

. but merely i medium above referred to.. v

liquid is admitted' drawmg, which represents an engine piston inlongitudinal diagrammatic section, supplied with connections suitablefor introducing thereinV the elastic cooling companying Cooling water orother through a stationary pi 'a disposed with# in a tube b of ateriameter, secured to and moving wit piston e. rihe relative dimensions ofthe stationary sup 1y pipe a and the movable tube b are suclr't at anannular passageway is left between them, through which air from theatmosphere or other source may be'admitted'to the chamher f formedinside of the piston. Also secured to the piston c, so as to reciprocatetherewith, is e discharge pipe d which is parallel with the tube b. Thepipes b and d in the p resent caseA have telescopic engagement rwith acasing g which vis appropriately formed tor accommodate their movements,without, however, affording communlcatlon from one to the other slavethrough the interior of the piston.

The supply ipe a discharges the water through a nozz e e, of suchdimensions that a )et of high velocity is produced, whichre- Amains asolid 'jet or column for some distance beyond the nozzle and preferablyuntil 1t strikes the wall of the piston chamber f, upon which itimpinges as indicated on the diagram. Simultaneously with the admissionof the water jet, air from the atmosphere is drawn or forced into thecasing g through the pipe z' thereof and passes into the tube b,ultimately' commingling with the water of the jet, so that an elasticmixture of commin led water and air is thereby produced, which mixturepasses out through the discharge ipe d into the outlet side of thecasing g w ich it will'be observed, serves 'as a separator for theliquid and air,'the air escaping to the atmosphere through the air pipeh, while the liquid collects in the hot-f tom of the-casing, where itcan be'separately removed to be used over again if desired. When coolingliquids other than( water are employed the separate recovery of the sameand alsoof the liquid passing o as vapor orparticles entrained with the'air is readily accomplished bythe means indicated.

. In someA cases the cooling water, instead of being directly introducedinto the cooling chamber formed in the piston, may be initially admittedas an air-entraining jet into an intermediateA chamber in communicationvwith the cooling chamber, and i desired two or more supply pipes, eachprovid with a nozzle, may beprovided for one and the same piston, andmore than one dischzige pipe can be similarly employed ifdesir thesebeing matters of ordinary adaptation to the l conditions encountered andnot requiring special description. it

will be obvious that the inlet'and outlet tubes can be arranged on thepiston in any suitable manner, concentric or otherwise as desired, andalso that the apparatus can be used for cooling reciprocating pistons orplungers of all kinds, for )instance plungers of compressors, or thepistons oi internal combustion engines, andthe like.

also t e suppl When the apparatus is used in connection likereciprocating members, the combinawith internal combustion engineshaving several cylinders, the cooling water for the various pistons maybe derived from a comlnon feed pipe arranged to supply the liquid underthe same pressure to all of the pistons, but in order`to insure that thedelivery of such liquid will be made in equal amounts in all pistons,the chambers therein may be made to communicate with each other in anysuitable manner so that the same pressure will prevail in each. Variousother modifications in the form and arrangement of the essential partsofthe apparatus may obviously be made for producing an elastic coolingmedium in place of the solid liquid heretofore employed. In any suchcase, the joints or parts by which the reciprocating piston is connectedto the'stationary supply of the cooling liquid. can be made withoutstufiing-boxes or other devices specially constructed to resist highpressure, the arrangeinentshown in the diagram being suliicient toconfine the liquid without leakage, when the connections between thestationary supply pipe and the piston are formed by telescopic joints.casln g is supposed to be stationary, as is pipe a, but it will beobvious that both mig t be movable with the piston if desired, in whichcase some provision for the supply of water thereto while in motion-will of course, be necessary.

Hiaving described my invention, I claim the following: f

1. Cooling apparatus for pistons and like reciprocating members,comprising means for introducing into the piston an elastic coolingmedium consisting of a ,mixture of a cooling liquid and a gas.

2. In cooling apparatus for'pistons and In the case illustrated, the

tion with the piston` having a cooling chamber, of a passagecommunlcating therewith provided with an air inlet and a 'nozzle'arranged to direct an air-entraining jet of liquid through thesaidassage.

3. Cooling vapparatus or pistons and like reciprocating members,comprising the piston having a chamber, means for injecting into thechamber a jet of cooling liquid, means for admitting air to the jet anda discharge passage for the mixture of liquid and air. v Y ,c

4. Cooling apparatus forpistons and like reciprocating members,comprising meansl for passing a cooling medium,l comprising liquid andas into the piston, an outlet therefor, am? a gas and liquid separatorcon'` nected to the outlet.

5. The combination of .a reciprocatory hollow piston having a tubemovable therewith and communicating with the interior thereof, said tubealso communicating `with the atmosphere, and a fixed pipe to inject anair-ent1'aining-jet lof water-through the tube and intorthe piston. t 46. In apparatus for cooling pistons, the combination of a piston havinga chamber municating with said chamber andwith the' atmosphere andreciprocating with the? pis- .A ton, a cooling water supply pipe withinthev air vtube and a. warm water discharge tube vformed within it, anair supply tube c0111-V v communicatin' vwith the chamber and re- 75ciprocating with the piston as setort-h.

In v testimony whereof I have aiiixedmy signature, in presence of twowitnesses.

' THEODOR REUTER. Witnesses:

WILHELM BACHMANN, AUGUST MARKHN..

